Speed-changing mechanism.



PATENTED OCT. 22 19075 n, G. D. MUNSING. SPEED CHANGING MEGHANISM.

APPLICATION FILED MAY 23,1907.

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luuenro PATENTED 00T. 22. 1907.

G. D. MUNSING. SPEED cmnwnlmf1 MEGHANISM.

APPLIATIOH/ FILED [AY 23, 1007.

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' 3 noauto@ anat/umg No. 868,935. l PATBNTBD 0012.22. 1907.

G. D. MUNSING.

SPEED CHANGING MBGHANISM.

APPLIUATION FILED HAY 23,1907.

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PATBNTED 00T. 22.11907.

G11). MUNSING. SPEEDSGHANGING MEGHANISM.

APPLIOATION FILED MAY 23. 1907.

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' band brake wheel, in which are mounted shafts 7 preferw Unirse stains PATENT enrich.

D. MUNSING, OF

NEW YORK, N. Y.

SPEED-CHANGING- MECHANISM.

lSpecification of Letters Patent. Application filed May' 23, 190'?-` 'Patented oct. 22, 1907. semi No'. 375,324.

panying drawings, and to letters or figures of reference marked thereon,

which form a part of this specification.

My invention relates to speed changing mechanism, and has for its'objectv to control'the speed of the driven part by reason of the slip between the driving and driven parts produced by the venting of thefluid from between them, said fluid being introduced in a suitable manner, as will lie-hereinafter 'more particularly described, the speed-changing mechanism or transmission being particularly adaptable to motor vehicles.

Referring to the drawings in which like parts are siniilarlj,l designated, Figure l is a longitudinal vertical section, partly in elevation. Fig. 2 is a sectionltaken on line of Fig. l. Fig. 3 is a section substantially on the line 3-3 of Fig. 1. Fig. 4 is a detail of the valve,y and Fig. is a perspective view showing a detail of the [luid retaining nnfmber. Fig. 6' is a modification, partly in vertical, horizontal section. Fig. 7 is a section on line 7-7 of Fig. G, and Fig. 8 is a detail of the valve showing the ports therein.

The drivingr shaft l has secured to or formed on its end a driving gear wheel 2, and has an end recess containing a wear sleeve 3, within which lsleeve is journaled the reduced end 4 of the driven shaft 5. Loose on the driven shaft is a brake member 6 constructed as a ably, but not necessarily, two innumber, and symmetrically disposed around the axis of the lirake inember. Qn one end of these shafts are the driven planet pinions 8 gearing with l he gea-r wheel 2 on the driving l shalt, and on the opposite ends of these shafts site side ofthe brake member l are the driving planet wheels El. 'lhc drivingy planet wheels 9 gear on the one hand with a geur wheel lil loose on the driven shaft 5, and ou the oUier hand willi an internally toothed ring ll forming part ol'an internal gear wheel. This toothed ring .ll is secured to a pump cas'e l2 whose boss 1.3 is keyed or otherwise secured lo tliedriven shaft 5.

The pump case is preleraby, but-not necessarily, l'ornicd willi a set-oil' port ion at a ol larger diameter than the pump case propcr, and it is in this portion that the toothed ring ll is secured, said ring serving to hold in place lhc removable annular wall -15 of the pump case.

Within thc pump case l2 is a piston 14, more clearly shown in Fig. 3, of a general elliptical shape, the ends of said elliptically shaped piston being provided with and oppol'of the cylinder Vclutch pins 29 are packing members 15, urged into engagement with the circular inner Wall of the cylinder` 12 by any suitable form of spring,16.l Journaled on the pin 17 in the wall 12 is a movable fluid retaining member or flap valve 18, whose free end 19 slides on the surface of the piston 14. This valve is' preferably located between the exhaust ports 20 and inlet port oi-.ports 21.

Mounted on the boss 13 of the piston 12 is an axially slidable valve mein'ber 22, whose boss 23 has a periph- .eral groove in which is mounted a two-part trunnion ring 24 the trunnions 25 of which are engaged by the forked end of the arm 26 mounted on the shaft 27 that is rocked by a lever arm 28. arm 43 urged by a spring 44 that is connected to some fixed part of the motor vehicle or the like, and tends to hold-the valve 31 open.

Secured to the valve member 22 are clutch ins 29 that are adapted to enter recess 30 in the piston 14 and act asa positive clutch member. The, exhaust ports of the piston are preferably short, peripheral slots 20 controlled by a grid-shaped exhaust valve 3]., more Clearly shown in Fig. 4, wherein these slots are shown closed by the grid valve, 3l.

The brake member 6 is provided with a brake band 32, one end of-which is internally threaded and secured by bolt 33 to the casing 34, the other end being free and moved into and out of braking action by a high pitched screw 35 operated by lever 3G, and this lei/er is connccted'by a two-part link 37 with lever 28, said link being adjustableby a turnbuckle 39 or equivalent device. The link 37 has at oneend a slot 40 to permit a slight'l idle movement of lever 36 without operating lever 28.

41 and 42 are suitable-journals secured in the casing 34 for the driving and driven shafts. l

The operation is as follows: The driving shaft 1 is suitably connected to the motor, and the gear wheel 2 is driven at thc same speed as shaft l, which in turning rotates the driven planet pinions 8, the shaft7 and the planct pinions 9.- ln the position shown in Fig. 1, Where the brake band 32 is loose on the brake member; the driving planet wheels 9 will rotate the loose gear wheel 10 and the internal gear wheel 1l together with its connected part, the pump cylinder 12, in a forward direction to rotate the driven shaft 5 forward and in the same direction as the driving shaft l and at the same speed. By moving the lever 36 in the direction of the arrow, thespring 44 pulls arm 43 to operate-fork 2G and'nioye the valve member 22 to open the exhaust.

ports 20 to permitthe escape of oil from between the end of the elliptical piston at 15 and the fluid retaining member 18. This movement is such that the withdrawn from their recesses 30 in the piston before the valve begins to releasethe oil. After the ports are fully open the lever 36 is moved farther in the direction of the arrow, the slots 40 in link Gn shaft 27 is keyed an` 37 permitting such movement without moving the valve, to apply the brake-band 32 to the brake-wheel 6 t0 h old it stationary, and'thereby cause the reversal ofthe direction of rotation oi the driven shaft, 'In the modification shown in Figs. 6, 7. and 8, the principle of operation is the same, but I have shown a slightly different structure of'pump caseand piston, the other parts being'substantiaily the same, and their operation identical. I I 10 The pumpcase, or fluid pressure brake, or retardingx device, has'A a cylindrical portion .12, in oneend oi which is lthe internal gearz wheell 11B, and adjacent theretol thewali 45a ormingne end of-the cylinder, otheren'd of the cylinder being' formed by a sepa- 15 Arateplate 54$ rlfhe said cylinder- .12a has-a portion 55, :lune-shaped in section, this portion acting asa retard- 'ing or limitingmeans for the liquid. the piston or r o tary member 14* being circular throughout and having a recess or pocket 56 for the reception of an auxiliary V piston 52, there being a space 57 between the* piston and pocket for the passage of oil, the auxiliary piston v 52 being continually urged into contact with theinner wall of the cylinder. i The piston o'r rotary member 14 is shown as formed in one piece lwith the loose gear wheel 10 instead of 'being keyed to it, and said circular piston '14 is tan-v gent to the` crescentshaped portieri` 55,"between the'- inletport 50 and the exhausttport 51.1 Aupackingvele' ment 15L` located between these two ports andhasan oil passage 58 leading behind the packing from on'e face v'of the ethau'stport5l, so'that'oil can pass behind the packing. 'ihe greater the pressure of theauxiliary piston52on 'theoil crowded in the space 58 between 'the pistorooljrotary member 14a and the portion 55', the greater will .be the pressure of the auxiliary piston 52 on theinner wall of the cylinder l2 and-.the pressure of the packing member4 l5 pn the rotary piston 14 by reason ofthe oil being forced through the passages 57 and 5S behind the piston. and packing. Y.

oiloutletsor'periorations 59' are formed `in the valve, audlthey-areclosed bythe axialmovement of'the valve-'22a sliding' on the cylinder l2 and before the exhaust port 51 isclosed. These holes form auxiliary passages to 'permitthe free circulationofoil i5y ,into and out ofthe pump cylinder when the mechanism isruvningidieng i `1c1aim-g 'f 1. In a speed changing mechanism, thecornbination with drivlngand driven shafts; of gearing between the two shafts, a cylinder, and a rotary' pistou therein to control the rotation of the gearing. v

2. In a lspeed changing mechanism, the combination with driving and driven shafts; of planet gearing between the two shafts, a rotary :cylinder and a rotary piston 55 therein both driven yby the planet gearing,"

' 3. Lu a speed vchanging mechanism, the`comhination with the driving and driven' shafts; ofy gearing between the two' shafts, a casing -for containing a tiuid and for said gearing and shafts," a rotary cylinder and a rotary 6 0 piston therein to control the rotation of the gearing and means to vent duid from the cylinder into the casing and .vice versa'. v

' 4. In a speed changing mechanism, the combination with the driving and driven shafts', of planet gearing between the` two shafts, a casing for containing fluid and forrsaid planet gearing, fluid pressure mechanism-to convtrol the -otaton of the planet gearing, means to vent fluid from the huid pressure mechanism into the-casing 'and-vice versa, -and means to positively lock the planet gearing against. rotation and thereby cause the Adriving and driven shafts to rotate in unison. Y

5. in a speed changing mechanism, the combination with .the-drivingv and driven shafts; of, gearing between vthe two shafts, a casing for said'gearing for containing duid, fluid pressure mechanism yto control the rotation of the planet gearing, avalve to control the passage of Huid to and from the iiuidpressure mechanism, and a clutch mechanism controlled by the movement of the valve to lock the gearing against rotation. `,6. In a speed changingmechanism, the combinatiou() with driving and driven shafts; of gearing between the two shafts,.luidpressure mechanism to control the'gearln'g, a duid container, a valve to control the passage of fluid-between the container and said mechanism", and. n clirtcl on the valve to lock ,they iiuidprcssure mechanlsnh and thereby lock the gearing focalise the two shafts tov rotatein unison. A

7. In a .speed changing mechanism. the combination 'with driving and driven slmftsrvof wheel secured to'ene of the shafts and' aninternal gearrwheel secured'QO' to theH other shaft Yand planet* gearing connecting the two, a cylinder and a ,rotary piston therein, both contained within the-internal gear wheel to control the, planet gearing., l r

8. In a speed changing mechanism, the combination withdriving and driven shafts; of a gear wheel secured to one of the shafts and an' internal gear wheel secured to the' other shaft, a brake member free to rotate with respect to vthe shafts, kplanet wheels mounted `on the brake member and gearing with the afore-rnentioned gear wheels, 100 fluid pressure mechanism to control the planet wheels, a naive. to control the passage of fluid to and from the mechanism; ac'brake band on the brake member and a' :single-lever to operate the brake band and control the valve. i. 105 v 9`. lna'speed lchanging, mechanism, the combination. with the planet gearing and the internal-gear wheel meshing therewith; of a. cylinder rotatable in unison with the internal gear wheel, a rotary piston. thereingeared to the planet gearing and a valve slldable on the cylinder to control the passage'of' uid to and from the cylinder.

10. In a speed changing mechanism, the combination with the planet gearing and the internal gear wheel mesh' ing therewith; of n`cylinder rotatable in unison with'the internal gear whcel, a rotary plston-thereingearedto the 1'15 planet gearing, a valve slidable on the cylinder, Aand n clutch on the valve to lock the piston, and internal gear wheel together. v .A 4

11. ln a speed changing mechanism, the. combination with the planet gearing and the internal gear Wheelv mesh- 1 2()- ing therewith; of a cylinder 4contained in the'internal gear wheel, a piston having clu'tch recesses, in saidlcylluder' free torrevolve with respect to the shafts,f a gear' wheel connectedvto the piston and meshing with the planet f gearing, a valve -toJzoutrol the passage of linld to and from the cylinder and clutch pins on the valve passing 'throughthe v cylinder 'to' engage .the recesses in the pistou.

12u11; a speed. changing mechanism, the combination with .driving and driven shafts, an internal gear wheel driven shaft, planet gearing mounted in the brake wheel and driven by Athe gear wheel `on thedriving shaft, and lengaging the internal gear wheel, a cylinder rotatable in unlsonlwith the internal gear wheel and having an eccentric portion on itsA inte'rnel surface, a` main piston sub- 135 stantially tangent to said eccentric portion an auxiliary piston in the main piston, a movable packing member in -the cylinder? means to admit iuid behind the packing member and auiriliary piston, a yvalve axially slidable Aon the cylinder. having inlet and outlet ports and auxiliary 14() vents, means to urge the valve in open position, a lever to move the-valve, a brake band and lever to operate the same,

a .slotted link connecting the two levers and a casing sur rounding the Whole device to control fluid for the cylinder.

13. -ln a speed changing mechanism, the combination 1 45 with a driving and driven shaft; of means to control the relative speed of the driven shaft comprising ,a cylinder rotating in unison with one of the shafts; and a rotary pistontherein, gearing connecting the piston and the lsecured 'on the-'driven shaft,A a brake wheel'looseon the 130 othelha1t,ad;m`eans ;t control the passage of a noncompressible fluid between,V the piston and cylinder.

14. In a speedl'cha-ng'ing mechanism, the combination g with two alined ,shatt'syof a cylinder on one of said shafts, a rotary piston therein, gearing connecting the piston and other shaft, a valve to control the admission of fluid to the cylinder, and means to lock the cylinder to rotate in unison.

15. In a speedy changing; mechanism the 'combination with two shafts; of a cylinder 0n one of the shafts having Y' and outlet port, a piston in the cylinder, gearing connectpiston and ing the piston to therother shaft, clutch devices on the valve to positlvelylqck the Apiston -and cylinder together and a fluid containingycasing surrounding the cylinderA and gearing. v

17. In a speed changing mechanism, the combination with two shafts; of a cylinder on one of thenhaving inlet and exhaust -ports and means tol control said' ports,

apiston in said cylinder, gearing connectingthe piston' to'tlie other shaftand means coperating with .thelgearing toreveise the direction of rotation of thelpiston'.

lIn testimony that I claim the foregoing as my invention;

I have signedvmy name in presence of two subscribingA tvit-y nesses.

GEORGE D. MuNsrNG.' Witnesses: v Y

WM. A. COLLINS, HARRY HOWLER. 

